Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 781 · 40 questions

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

1. 1.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) lemon juice (c) water (d) white paper strips
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the light we look in
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the colour we see (d) the number of drops
5. 5.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) soap solution (d) salt water
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
8. 8.True or false: soap solution keeps turmeric yellow. (a) False (b) True
9. 9.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
10. 10.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
11. 11.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) reddish (d) green
12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
13. 13.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress
15. 15.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) white paper strips (d) turmeric powder
17. 17.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
18. 18.🫧 Which of these is an acid? (a) plain water (b) salt water (c) soap solution (d) tamarind water
19. 19.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
20. 20.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a dropper or spoon (d) a magnet
22. 22.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
23. 23.🫧 Which of these is a base? (a) tamarind water (b) plain water (c) lemon juice (d) baking soda water
24. 24.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
25. 25.True or false: a balloon is needed for the turmeric test. (a) True (b) False
26. 26.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) lemon juice (d) a balloon
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
29. 29.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is an acid (d) soap is magnetic
33. 33.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
34. 34.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
35. 35.True or false: yeast is not needed for the turmeric test. (a) False (b) True
36. 36.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
37. 37.🫧 Which of these is an acid? (a) orange juice (b) detergent water (c) baking soda water (d) plain water
38. 38.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) plain water (d) baking soda water
39. 39.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
40. 40.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True

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